Crafted from heat-treated steel, the Magpul Armorer's AR-15/M4 Wrench fits most pin-style barrel, rifle receiver extension and carbine castle nuts, as well as flash hiders and muzzle brakes and more. The exterior finish helps you keep a firm hold on the tool.

Features and Benefits

Made in USA

Works with most stock and pin-style barrel, rifle receiver extension and carbine castle nuts